7) Solve the following system by the substitution method. Check the solution(s).

5x +y = 28
y = 2 - x

(a) (8%) compute the probability of an even integer among the 100 integers 1! , 2! , 3! , until 100! (here n! is n factorial or n*(n-1)*(n-2) *… 1) (b) (16%) compute the probability of an even integer among the 100 integers: 1, 1+2, 1+2+3, 1+2+3+4, …., 1+2+3+… + 99, and 1+2+3+… + 100

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

Finding tbe values of the variables in each kite